protected String getImageFieldValue(UploadRequest uploadRequest, String fieldNameValue) { try { byte[] bytes = getImageBytes(uploadRequest, fieldNameValue); if (ArrayUtil.isNotEmpty(bytes)) { JSONObject jsonObject = JSONFactoryUtil.createJSONObject(); jsonObject.put("alt", uploadRequest.getParameter(fieldNameValue + "Alt")); jsonObject.put("data", UnicodeFormatter.bytesToHex(bytes)); return jsonObject.toString(); } } catch (Exception e) { } return StringPool.BLANK; }